Solar energy refrigeration device

Abstract

The invention relates to a refrigeration device using solar energy. This device includes a refrigeration fluid, such as water, which circulates between the solar energy heat exchanger 8 containing zeolite, and an evaporator 2 located in a cooling chamber 1 through a condenser 6, then return to the exchanger 8 through a three way valve 7. The device includes a second channel in the exchanger 8, which channel includes a fluid, and a second exchanger consisting of a tube with fins 20 connected to a storage tank 25 containing water at various temperatures. During the day whenever the period of sunshine is not sufficient, additional heat in the form of hot water is provided to the exchanger 8. Conversely if the night temperature is not low enough, cooling in the exchanger 8 is assisted by a cooling device 23 located in the second channel. Hot water 25° C. is provided by the excess heat produced by the sun at day's end.

We claim: 
     
       1. A refrigeration device comprising a solar collector containing a substance having a high adsorption and desorption capability, a condenser, an evaporator, a first channel including said condenser and said evaporator and having means for connecting said solar collector through said condenser to an input of said evaporator and, alternatively, for connecting said solar collector to an output of said evaporator, said first channel having a refrigeration fluid therein, and a separate second channel including a heat exchanger disposed in said substance, said second channel having means including a second fluid adapted to circulate through said heat exchanger for transferring heat between said substance and said second fluid. 
     
     
       2. A device in accordance with claim 1, wherein said means for transferring heat includes a storage tank for said second fluid and having different temperature zones, said second channel having an input to said heat exchanger connected to one of said temperature zones and having an output from said heat exchanger connected to another of said temperature zones. 
     
     
       3. A device in accordance with claim 1, wherein said means for transferring heat includes a cooling device and means for connecting said cooling device in a closed loop including said heat exchanger. 
     
     
       4. A device in accordance with claim 1, wherein said means for transferring heat includes a storage tank for said second fluid and having hot, cold, and lukewarm temperature zones, means for selectively connecting either said hot zone or said cold zone to an input of said heat exchanger, and means for connecting an output of said heat exchanger to said lukewarm zone. 
     
     
       5. A device in accordance with claim 4, wherein said means for transferring heat includes a cooling device and means for connecting said cooling device in a closed loop including said heat exchanger. 
     
     
       6. A device in accordance with claim 1, wherein the second channel includes a circulator connected to an input of the heat exchanger. 
     
     
       7. A device in accordance with claim 1, wherein the evaporator is disposed in a cold chamber and the condenser is connected to the input of the evaporator via a pressure reducer.